An excellent format for such a large topic: questions and answers about the ocean. Did you know that 75 percent of our planet is ocean, and 70 percent of the human body is made of water very similar to ocean water? This book made me realize again for the 100th time. I didn't learn very much in school, and I have a lot further to go. One question it didn't answer well for me yet, Why do we know less about the ocean than anything else in the universe? What books have updated these answers in the last 20 years?